Skate-roller.



PATENTED DEC. 4, 1906.

G. C. PLUMMER. SKATE ROLLER. APPLIUATION FILED MAR.12,1906.

o -recesses for receiving the edges of the disks relatively heavy'IIOIS,

structed when merely .the roller-centers.

' UNITED STATES PATENT OFFICE.

GEORGE O. PLUMMER, OF CHICAGO, ILLINOIS, ASSIGNOR OF ONE-HALF TO THOMASJ. HRUBY, OF CHICAGO, ILLINOIS.

SKATE-ROLLER.

Specification of Letters Patent.

Patented Dec. 4, 1908.

Application filo! March 12. 1906. fields-1N0. 305,827.

T0 at whom it maycortcern:

Be it known that I, GEORGE C. PLUMMER, a citizen of the United States,residing at Chicago, 1n the county of Cook and State of Illihaveinventeda new and useful Imrovement in Skate-Rollers, of which the folowing is a s ecification.

Skate-r01 ers wear quite rapidly at the tires, and it frequently becomesnecessary to discard rollers as hitherto usually conthe tire portionsare worn out.

My object is to provide a ball-bearing skate-roller having acomparatively thick or heavy tire and so constructed that the same maybe readily removed and replaced with a new one when necessary.

My object is further to provide such a are detachably secured togetherwithout the use of rivets or bolts and nuts. Referring to theaccompanying drawings,

Figure 1 is a view in cross-section of my improved skate-roller, thesection being taken throughits diameter. Fi 2 is a plan view of asheet-metalblank or isk form ng one of Fi 3 is a similar view of amodification of the s est-metal disk shown in Fig.2. Fig; 4 is a viewsimilar to Fig. 1 of a modification of the roller, 'showin a ballbearingaxle mounted therein; and 'g. 5, a view similar to Fig. 4 of anothermodification of the roller. I

In Figs. 1 and 2 is illustrated the preferred embodiment of'm invention,which consists of'asheet-metal lank or disk 6, forming a roller-center,in which are cut radial tongues 7 7, extending beyond its circumference,and radial tongues 8 8 with their ends flush with the edge of the diskand alternatin with the tongues 7. The central portion 0 the disk isperforated and stamped to form a hub or be l-rac'e 9, and the tongues 7and 8 are bent correspondingly at right angles to the body of the disk.10 is a tire or-troad portion compared with the disks and provided withannular recesses 11' in its opposite faces, forming shoulders 12. 13represents annular sockets in the walls of the when expanded into them,as hereinafter described. Two of the disks 6 are employed for formingeach roller, the disks being fitted v at their peripheries into theannular sockets 13 by springing the disks to thus cause them tobeexpands at their outer ed es into the sockets, the disks on aging the soulders 12.

to hold the disks ii i 1y separated from each other. The shoul ers 12serve asguides'to direct the disks 6 into such disks on their rearsides, extendin as position in the undercut recesses 13 thereof, as wellas to support-j they do some distance below the point w ere the edges ofthe disks contact with the undercut portions thereof. The disks areositioned in the recesses to cause each 0 the ten use 7 to overlap andcoincide with one of t e tongues 8 on the op osed disk, the tonguesprojectin through t 1e openings or recesses 14 in the isks beyond thetongues 8. Thetongues 7 are then bent outeniprojecting ends against theouter surface 0 the disks, as indicated in Fig. 1. The tongues 8 thusabut at their ends against the inner surfaces of the opposed disks andmainover at theirtain the disks rigidly separated from each other. i

The modification of roller-center illustrated in F ig. 3 differs fromthe construction just described in that the tongues 7 instead of beingof uniformwidth are shouldered at their outer ends, as indicated at 15,and radial slots 16, corresponding in size to the outer shouldered endsof the tongues 7 and alternating with them, are substituted for thetongues 8. The disks are applied to the tire in the manner described asto the construction shown in Fig. 2, the 0111 difference being in themanner of holding t e arts to gether, which in this case is accomp ishedby causing the tongues 7 to pro'ect at their shouldered endsthrough oneo the slots or openings 16 in the opposed disks,-the projecting endsbein then bent over against the outer surface of t 1e disks.

In the modification illustrated in Fig. 4 the disks differ from. thatjust described in that no tongues or slots are provided for clamping.

t d in the plates in position, e disks being he place by engagement oftheir eripheries'with the annular sockets 13- and slibulders 12. .Inthis 131 re the skate-roller is shown journaled on a TihlI-bearin axle17, the balls 18 of, which are house between the ball-races 9 and cones19 on the axle. 1

Inc

In the modification shown in Fig. 5 the J hub 20 of the roller insteadof being integral with the disks is a separate art therefrom of contactof the roller-centers with the unand is provided with a centre annularflange 21 about its outer circumference. The form of disk illustrated isthe same as that shown in Fig. 3, excepting that it has its centralportion cut away to adapt the disks to fit upon the hub 20 from itsopposite sides against the flanges 21 and be clamped together, asdescribed with reference to the construction shown in Fig. 3, forsecurin the tire 10, hub 20, and disks 6 rigidly toget er.

While I have illustrated and described my skate-roller as being providedwith annular sockets in its tire-recesses, into which the disks areexpanded, the use of sockets as relates t the constructions shown inFigs. 1, 2,

3, and 5 are not necessary in carrying out my invention, a shoulder onlyon each of the opposite faces of the tire against which the disks mayabut being necessary.

What I claim as new, and desire to secure by Letters Patent, i

Lin a hollow skate-roller, the combina tion with a comparatively heavytire, provided in opposite faces with annular recesses, of annularshoulders surrounding the recesses, said shoulders being undercut, and

roller-centers comprising annular sheet-metal disks expanded at theircircumferential edges into engagement with the undercuts, the cutawayportion of the tread extending below the point of contact of theroller-centers with the undercut portions.

2. In a hollow skate-roller, the combination with a comparatively heavytire, provided iii 0'[)pOSltC 'fpces with annular recesses, of shoulderssurrounding the recesses, said shoulders being undercut, androller-centers comprising annular sheet-metal disks formed with innerball-race members, and expanded attheir circumferential edges intoengagement with the undercuts, the cut-away portion of the treadextending below the point dercut portions.

3. In a hollow skate-roller, the combination of a comparatively heavytire provided in op )osit-c faces with annular recesses surrounded byshoulders, and roller-centers comprising annular sheet-metal disksfitting said shoulders at their peripheries, and means for fastening thedisks in place comprising a series oftongues each cut from one of thedisks and bent inwardly to extend to and engage the other disk.

4. In a hollow ska,te-roller, the combination of a comparatively heavytire provided in op osite faces with annular recesses surround iid byshoulders, and roller-centers comprising annular sheet-metal disksformed with recesses, and fitting said shoulders at their peripheries,and means for fastening the disks in place, comprising tongues cut fromone of the disks forming shoulders to bear -against the opposing diskand having end portions passing through the recesses in said opposingdisk and upset beyond said recesses.

57 In a hollow skate-roller, the combination of a comparatively heavytire provided in op ositc faces ,with annular recesses surrounriiid. byshoulders, and roller-centers comprising annular sheet-metal disksformed .with recesses and fitting said shoulders-at their peripheries,and means for fastening the disks in place, comprising tongues each cutfrom one of the disks and formed with shouldered ends to hear at theirshouldered portions against the opposing disk, the end portions beyondsaid shoulders passing through the recesses in said opposing disks andbeing fastened beyond said recesses. GEORGE C. PLUMMER. In presence o fW. B. DAVIES, A. M. UHER.

